Improvement in lamp-chimneys



. t m eftim 1" Be it known that reepsesw. GaIswoLD, of

of Pennsylvania, haveinvented certain new and useful ImproirementSiu Shieldsfor Grla'ss Chimneys used on Lamps, 850.; and I do hereby declare the following to he a'full, clear, and;exact description-thereof, reference being had to the accompanying drawing making apart of thisspecification,;-in*which+- Figure 1 represents a chimney with the shield therein; t; i

. Figure2 represent alverticals'ection through the same; and. '1 v i Figure 3 representsa topplan of the shield.-

from cracking and breaking by h eat of the flame "of a lamp or other bumea V l My-invention consists in an attachable and removaole shield of metal, which is suspended within the glass chimney, andpan expand and icontr'actywithout injury to itself, and, at the same time, shield the glass chimney surrounding it from suddenand intense heat, and

admitof its free expansion;

To'enableother s skilled in theart to make and use i myinven'tion,:1 will pr'oceed to; describe the same with reference to the drawing. l I I 5A represents a glass chimnejy, which may be of any of thekno wn and preferred shapes or forms.

Factoryville, in thecounty of Wyoming and State *eiioReErW. eiuswow, oF FAOTORXVILLE, PENNSYLVANIA.

11 Letters Patent Nos-112,446, dated March 7', 1871.

The chedju le irfen ed to in these Letters Patent-and making part oi the same.

Bis a metal shield, of conical ors'uch other form as will admit of its easy application to a chimney. v

. This shield Bfinsteetd of-having its edges an solsimply lapped over,'as seen in the drawing, which not heat of the flame, but allows it to he fitted to chim neys of'difierent sizes without preventing'or restraining the expansion and contraction of the glass-chimney.

At b is represented a way of holding the shield to the chimney hya bent wire or rod. Any. other fastening that will admit of an easy removal and replacement of the shield would answer as well as that I am awarethat many forms and kindsof shields have been essayed for glasscliimneys, to prevent them and described, GEORGE W. 'GRISWOLD.

\Vitnessesz' CHRISTIAN DOOLITTLE,

dered or riveted, as is the common way, has its edges only allows" it to expand and contract freely by the.

chimney for lamps, a 

